Method of producing water from steam



Fgb. 4, 1930. P. FIABYER 1,745,364

METHOD OF PRODUCING WATER FROM STEAM Filed Jan. 4, 1928 40 g heatingsteam. This quantity of steam can .be again superheated and again usedfor Patented Feb. 4, 1930 UNITED STATES PATENT OFFICE PAUL FABER, OFBADEN, SWITZERLAND, ASSIGNOR TOAKTIENGESELLSCHAFT BROWN, BOVERI AND CIEOF BADEN, SWITZERLAND METHOD OF ,I'RODUCING WATER FROM STEAM Applicationfiled January 4, 1928, Serial No. 244,492, and in Germany January 5,1927.

Methods are known, in which the addi tional water of a steam boilerplant is evaporated by superheated boiler steam diprovides thepossibility of producing any desired quantities of distillate by heatingwith rectly, for instance by introducing the superheated steam into thewater or by injecting the water into the superheated steam. By thismeans the passage of heat through walls and dirtying of the latter isprevented. The production of distillate by means of superheated steamhas the disadvantage, however, that only a limited quantity can beproduced, even if all the working steam be used for the distillation.The superheating heat of the heating steam must be suflicient both forheating the arriving water up to the evaporating temperature and forsupplying the' evaporating heat of the water to be evaporated. Themethod according to the present invention,

I superheated steam and by direct introduction into the water, theprocedure being. as follows. The superheated working steamcoming fromthe steam boiler, or a portion thereof, is brought into contact in anevaporating vessel with the water to be evaporated, the superheatingheat being transmitted to the water and evaporating a portion of thesame. The quantity of steamthus increased, and consisting of theoriginally introduced heat- 7 ing steam and of. the evaporated quantityof water, has thetemperature of saturated steam "and is reheated in asecond superheater to a considerably high superheating temperature. Thissteam is thereupon conveyed to a second evaporating vessel where theincreased quantity of steam, by giving off its superheating heatevaporates a-larger quantity of Water than inthe first evaporator,which, in the form of steam, also becomes mixed With the evaporatingwater and so on, until the required quantity ofwater has beenevaporated. The quantity of working steam is then con- 1 veyed directlyto the point Where it isto be used. Theremaining quantity of steam cor-I responds to the evaporated water and is con- In the accompanyingdrawing a constructional example is shown diagrammatically. In thisdrawing 1 is the steam boiler, 2 the superheater, 3'the firstevaporator, 4 the second superheater, 5 the second evaporator and 6 thethird superheater, for superheating the working steam. 7 is the feedwater pipe, through which the water is introduced into the evaporators 8and 5. 8 is the condenser in which the required liquid distillate isprothe evaporator and leading at least part of said augmented quantityof saturated steam into a condenser where it is condensed.

I 2. A method of producing distillate from steam as claimed in claim 1wherein the steps of superheating and subsequent evaporating arerepeated. I y 3. A method of producing distillate as claimed in claim 1wherein the cooling water for the said condenser is utilized for feedingthe evaporator.

4. A method of producing distillate as claimed in claim 1 wherein theproportion of the augmented quantity of saturated steam is regulable.

In testimony whereof I have signed my name to this specification.

' PAUL FABER.

